<template>
  <view class="login-container">
      <!-- 提示登录的图标 -->
      <uni-icons type="contact-filled" size="100" color="#AFAFAF"></uni-icons>
      <!-- 登录按钮 -->
      <button type="primary" class="btn-login" open-type="getUserInfo" @getuserinfo='getUserInfo'>一键登录</button>
      <!-- 登录提示 -->
      <view class="tips-text">登录后尽享更多权益</view>
    </view>
</template>

<script>
  import { mapMutations, mapState } from 'vuex'
  export default {
    name:"my-login",
    computed:{
      ...mapState('m_user', ['redirectInfo'])
    },
    data() {
      return {
        // 默认的token
        token: "Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJ1aWQiOjEyLCJpYXQiOjE1MjU0MDIyMjMsImV4cCI6MTUyNTQ4ODYyM30.g-4GtEQNPwT_Xs0Pq7Lrco_9DfHQQsBiOKZerkO-O-o"
      };
    },
    methods:{
      ...mapMutations('m_user', ['updateUserInfo', 'updateToken','updataRedirectInfo']),
      getUserInfo(e) {
        // 判断是否获取用户信息成功
            if (e.detail.errMsg === 'getUserInfo:fail auth deny') return uni.$showMsg('您取消了登录授权！')
        
            // 获取用户信息成功， e.detail.userInfo 就是用户的基本信息
            this.updateUserInfo(e.detail.userInfo)
           
           // 获取登录成功后的 Token 字符串
             this.getToken(e.detail)
      },
     async getToken(info) {
       // 调用微信登录接口
       const [err, res] = await uni.login().catch(err => err)
       // 判断是否 uni.login() 调用失败
       if (err || res.errMsg !== 'login:ok') return uni.$showError('登录失败！')
     // 准备参数对象
       const query = {
         code: res.code,
         encryptedData: info.encryptedData,
         iv: info.iv,
         rawData: info.rawData,
         signature: info.signature
       }
     
       // 换取 token
       const { data: loginResult } = await uni.$http.post('/api/public/v1/users/wxlogin', query)
       // if (loginResult.meta.status !== 200) return uni.$showMsg('登录失败！')
       uni.$showMsg('登录成功')
       // 服务器生成不了新的token，这里用默认的token代替
       this.updateToken(this.token)
       this.navigatBack()
     },
     navigatBack() {
       if (this.redirectInfo && this.redirectInfo.openType === 'switchTab') {
         uni.switchTab({
           url: this.redirectInfo.from,
           complete: () => {
             this.updataRedirectInfo(null)
           }
         })
       }
     }
    }
  }
</script>

<style lang="scss">
.login-container {
  // 登录盒子的样式
  height: 750rpx;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background-color: #f8f8f8;
  position: relative;
  overflow: hidden;

  // 绘制登录盒子底部的半椭圆造型
  &::after {
    content: ' ';
    display: block;
    position: absolute;
    width: 100%;
    height: 40px;
    left: 0;
    bottom: 0;
    background-color: white;
    border-radius: 100%;
    transform: translateY(50%);
  }

  // 登录按钮的样式
  .btn-login {
    width: 90%;
    border-radius: 100px;
    margin: 15px 0;
    background-color: #c00000;
  }

  // 按钮下方提示消息的样式
  .tips-text {
    font-size: 12px;
    color: gray;
  }
}
</style>
